Single-axial precision measuring apparatus
a precision measuring and single-axial technology, applied in the direction of force measurement, force measurement, force measurement, etc., can solve the problems of increasing the difficulty of measuring accuracy, affecting measurement results, and affecting so as to improve the accuracy of measurement, facilitate the flattening of films, and prevent curvature and warp in the boards
Inactive Publication Date: 2005-04-26
BARMU TECH
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Benefits of technology
"The invention is a single-axial precision measuring apparatus for linear distances. It includes a flatbed with ventilation openings and a suction tube, a flattening mechanism with multi-sectional halt heights, and a distance measuring mechanism with an optical ruler, laser positioning element, and CCD cameras. The CCD cameras capture images of measuring points and transmit them to a monitor. The apparatus also has a temperature sensor to compensate for temperature variations and ensure measuring accuracy. The technical effects of the invention include improved accuracy in measuring, compatibility with different surfaces, and ease of use."
Problems solved by technology
A charge coupled device (CCD) camera is disposed above a table for enlarging the circuit boards or films, which are then positioned and measured in coordination with naked eye; artificial visional errors are hence frequently incurred.
Furthermore, pictures are taken by the CCD camera in a downward direction, and measurement results are likely affected due to errors in focal lengths caused by different thicknesses of the circuit boards or films.
Above all, when disposing a camera above a table, errors of measurement accuracy is further worsened by curvatures and warps in the plates in the lack of flattening mechanisms.
Method used
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[0017]To better understand the structure, devices and characteristics of the invention, detailed descriptions shall be given with the accompanying drawings hereunder.
[0018]Referring to FIGS. 1 to 4, a single-axial precision measuring apparatus according to the invention comprises a base 10, a flatbed 20 at the base 10, a flattening mechanism 30 and a monitor 40 above the flatbed 20, and a distance measuring mechanism 50 below the flatbed 20. The characteristics of the invention are that:
[0019]the flatbed 20 is a transparent plate having a plurality of ventilation openings 21 that are connected with a suction tube 61 of a vacuum suction device 60; the flattening mechanism 30 is driven for up-and-down displacements by a servo motor 31 and a timing belt 32, and is provided with multi-sectional halt heights through program controls; and the distance measuring mechanism 50 disposed below the flatbed 20 is capable of transverse movements, and at least has an optical ruler 51, a laser pos...
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Abstract
A single-axial precision measuring apparatus includes a base, a flatbed at the base, a flattening mechanism and a monitor above the flatbed, and a distance measuring mechanism below the flatbed. The characteristics of the invention are that, the flatbed is a transparent plate having a plurality of ventilation openings that are connected with a suction tube of a vacuum suction device; the flattening mechanism is capable of up-and-down displacements, and has multi-sectional halt heights through program controls; and the distance measuring mechanism disposed below the flatbed is capable of transverse movements, and at least has an optical ruler, a laser positioning element and CCD cameras. Wherein, the CCD cameras focus at the measuring points, and transmit images captured to the monitor.
Description
BACKGROUND OF THE INVENTION[0001](a) Field of the Invention[0002]The invention relates to a single-axial precision measuring apparatus, and more particularly, to a measuring apparatus for measuring apertures and planar measurements of circuit board films or finished products. Apart from optical lock-point guidance and computerized linear measuring, the single-axial precision measuring apparatus also adopts vacuum suction and a multi-sectional flattening mechanism for fixing without damaging the films or boards, while also overcoming curvatures and warps in the boards. The single-axial precision measuring apparatus additionally has a temperature compensation / adjustment device for avoiding material variations due to temperature changes, and thus minimizing measurement errors.[0003](b) Description of the Prior Art[0004]Manufacturing process of prior circuit boards includes tasks such as drawing masters, films and production boards, and drilling. Present circuit designs of circuit board...
Claims
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IPC IPC(8): G01L1/24G01B11/02H05K13/04
CPCH05K13/0413G01B11/024
Inventor HSIAO, CHENG-FU
Owner BARMU TECH